$ git clone -n https://src.fedoraproject.org/rpms/rust-idna0.1.git /var/lib/mock/f40-build-2037224-48082/root/chroot_tmpdir/scmroot/rust-idna0.1
Cloning into '/var/lib/mock/f40-build-2037224-48082/root/chroot_tmpdir/scmroot/rust-idna0.1'...
$ git fetch origin 8686e15457912f20f2e3d7a7c75647fb13e07cd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-idna0.1
 * [new ref]         8686e15457912f20f2e3d7a7c75647fb13e07cd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8686e15 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild